except for that the parents say that the olderbrother,tamerlan, stayedwith them in dagestan, in the capital city and the father claims-- although the father and mother seem wounded and deluded to say the least about their sons' activities-- say that he was with them almost all the time and that he visited some relatives in chechnya as well. who he was seeing, what he was doing, we're not clear in a minute-by-minute basis. he was going to the mosque, there's nothing ostensibly wrong with that, anybody going church or synagogue. so what law enforcement authorities, what intelligence authorities in russia and the united states are going to have to figure out what s what those movements there as well as here. >> rose: and was there some noticeable change after that? >> when he came back? >> rose: yes. in terms of what they tweeted or anything else. >> i think the intensity of it increased. certainlin the last year, for example, the twitter feed of the younger brother dzhokhar becomes -- again, this is all in the rear-view mirror. this is all applying what we know or we believe t